City of Regina
Standard Construction Specification
SECTION 02999
TRENCHLESS SEWER MAIN REPAIRS – Fiberglass Reinforced Epoxy
1.0
GENERAL
1.1
2.0
Work Included
1.1.1
Supply and installation of impregnated bi-directional woven fibreglass tissue
with a predetermined epoxy resin. The impregnating tissue is rolled on a
pneumatic tube (thermomandrel) corresponding in length with the length to
be repaired. The thermomandrel will then be slipped inside the conduit
(concrete, clay, brick, PVC, etc.) to repair using a nearby manhole.
1.1.2
Existing CCTV tapes, video logs and location plans of all spot repairs are
available for review at the office of the Engineer.
PRODUCTS
2.1
2.2
Materials include:
2.1.1
Balanced bi-directionally woven fiberglass tissue
2.1.2
Two Component epoxy resin as binding matrix
General Physical Properties of the Fiberglass
Tension Load
Tension Modulus
Thermal Expansion Coefficient
Break Elongation
Elastic Recovery
2.3
General Physical Properties of the Resin
Tension Load
Tension Modulus
Flexion Load
Flexion Modulus
Elongation
Barcol Hardness
Thermal Expansion
2.4
3.4 x 103 MPa (493,000 psi)
72 x 103 MPa (10,442,000 psi)
2.8 x 10-6 po/po/°C
4.8%
100%
ASTM D638
ASTM D638
ASTM D790
ASTM D790
ASTM 2583-81
ASTM D696
60 MPa (8,700 psi)
3.3 x 10 MPa (478,600 psi)
100 MPa (14,500 psi)
2.1 x 103 MPa (304,500 psi)
4.5% to 12%
50
-6
52 x 10 po/po/°C
3
Composite Material
Tension Constraint
Tension Modulus
Flexion Constraint
Flexion Modulus
Hardness (Shore D)
Latest Revision, August 2010
ASTM D638
ASTM D638
ASTM D790
ASTM D790
250 MPa (36,250 psi)
8.0 GPa (1,160,000 psi)
250 MPa (36,250 psi)
9.0 GPa (1,305,000 psi)
> 80
Page 1 of 3
City of Regina
Standard Construction Specification
SECTION 02999
TRENCHLESS SEWER MAIN REPAIRS – Fiberglass Reinforced Epoxy
2.5
Chemical Resistance
2.5.1
2.6
Resin Mix
2.6.1
2.7
3.0
The bi-directional tissue layers shall overlap when wetted.
Wall Thickness Design
2.8.1
2.9
Two component epoxydic resin mix controlled by volume. The homogenated
mix shall be applied on the different layers of the bidirectional fiberglass
tissue. The mixing and the wetting shall be made at the plant.
Fiberglass Stratification
2.7.1
2.8
Resist sewer gas including carbon monoxide, dioxide, hydrogen sulphide etc.
The fiberglass tissue shall not be affected by chemicals, bacteria, fungus or
insects.
The thickness shall be established by the Contractor, considering the size of
the conduit to be lined.
Submittals
2.9.1
Submit information on material, procedure, wall thickness for each line prior
to installation.
2.9.2
Submit as-build data to the Engineer indicating locations of lines repaired
following installation.
2.9.3
Submit a field sample for every 10 spot repairs completed. Longer spot
repairs which are completed in multiple segments will be considered as one
spot repair. Typically sample locations will be adjacent to manholes so the
repair material can be confined and subject to the same curing as the adjacent
spot repair. The City will bear the costs of testing.
EXECUTION
3.1
Notification of Residents/Businesses
3.1.1
Latest Revision, August 2010
The Contractor is responsible for notification of residents/businesses of
disruption of sewer service. Contractor must liase with residents/businesses
during spot repairs and advise when normal service is restored. Provide
alternative service to residents/businesses as required.
Page 2 of 3
City of Regina
Standard Construction Specification
SECTION 02999
TRENCHLESS SEWER MAIN REPAIRS – Fiberglass Reinforced Epoxy
3.1.2
3.2
Conduits Cleaning
3.2.1
3.3
3.4
The manholes and the conduits shall be cleaned to remove roots, debris and
other deposits that could cause problems during installation.
Inspection
3.3.1
The section to be lined will be CCTV inspected before and after installation.
3.3.2
The laterals will be detected and thoroughly noted to minimize possible errors
when reopening them after lining.
3.3.3
If the inspection reveals major defects, notify Engineer before remedial
actions are undertaken.
Laterals Opening
3.4.1
3.5
Traffic Accommodation: Follow all requirements as set out in the City of
Regina’s Manual for Temporary Traffic Control.
The laterals shall be reopened with a remote controlled robotic cutter for nonaccessible sewers. A CCTV camera shall be used to ascertain position.
Installation
3.5.1
Clean existing line and complete a CCTV inspection prior to installation. A
digital file shall be made of the CCTV inspection.
3.5.2
The flow of water shall be by-passed above ground till the closest possible
other manhole if required.
3.5.3
The composite (fibreglass and resins) shall be prepared in a shop under a total
quality control. On-site preparation will be acceptable based on onsite
preparation facilities which meet the approval of the Engineer.
3.5.4
The wetted composite materials shall be transported to the jobsite and slipped
into the conduit to be lined.
3.5.5
Cure with steam for a predetermined time based on diameter and length
(between 45 and 90 minutes).
3.5.6
Cool and retrieve the thermomandrel to be reused for other insertions.
3.5.7
Open the lateral connections to reinstate service.
3.5.8
Provide CCTV inspection report and video after installation.
Latest Revision, August 2010
Page 3 of 3